Good job on sticking it out and finishing the class!
That first workout is tough to finish. It feels like it's never going to end! But afterwards you feel great and the next class will be semi more enjoyable.
Baby steps are very important! We get so caught up in the past, or the future and our goals that we can get frustrated with how much time it may take and feel discouraged.
Keep up the good work and you will be victorious.